Window frame



FIG. 1 is a front perspective view of a window frame embodying the new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof, the left side view being a mirror image;

FIG. 6 is a top view thereof, the bottom view being a mirror image;

FIG. 7 is a sectional view taken along line 7—7 in FIG. 4;

FIG. 8 is a sectional view taken along line 8—8 in FIG. 4;

FIG. 9 is an enlarged view of the area within line 9 in FIG. 7; and,

FIG. 10 is an enlarged view of the area within line 10 in FIG. 8. 

The ornamental design for a window frame, as shown and described. 